Enhanced Output Electricity of Coupled Phase Change Material-Thermoelectric Generator System with Optimized Interfacial Thermal Conductivity
The thermoelectric electricity components have the advantages of small size,high reliability,and no mechanical motion com-ponents.They are often used in the heat source fluctuation environment.Because phase-changing materials can absorb and release a large amount of heat in constant temperature,they are widely used in the thermal power generation system to improve their thermal energy utilization rate.In the phase change-thermoelectric coupling system,the interface thermal resistance between the phase-changing material and the thermoelectric module affects the heat transmission of the system,which strongly affects the power generation perfor-mance of the system.Use the classic enthalpy model and thermoelectric coupling equation to describe the heat transfer and energy conversion process in the phase-changing materials and the thermoelectric power generation components,and the decoupled coupling equation is used to explore the effects of the thermal resistance of the interface on the coupling system.The results show that the thermal resistance of the optimal interface makes the total output power of the phase change-thermoelectric system reach its peak.By giving the convenience and feasibility of improving the performance of the system by optimizing the thermal resistance of the interface,it is conducive to the more extensive application of thermoelectric electrical components under the condition of fluctuating thermal source.
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